netdev - Re: bnx2 driver reports WoL not supported when it actually works

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Message-ID: <1551EAE59135BE47B544934E30FC4FC0940168@nt-irva-0751.brcm.ad.broadcom.com>
Date:	Thu, 7 Jun 2007 00:30:31 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	"Tim Mann" <mann@...are.com>
cc:	netdev@...r.kernel.org
Subject: Re: bnx2 driver reports WoL not supported when it actually
 works

Tim Mann wrote:

> Hi, Michael.  We have some IBM blades with a BCM5708-based dual-port
> NIC that the bnx2 driver reports as not supporting wake-on-LAN.
> (Ethtool says "Supports Wake-on: d".)  However, IBM says that WoL is
> supported by these NICs, and in fact when I tried putting the blade
> into soft-off and sending a magic packet to it, it did wake up!  I
> tried both ports, and they both worked.
> 

In this case, the driver is not supporting WoL because Serdes chips
draw more than the maximum current allowed under Aux. power.  The
blades generally will have no problem supporting WoL because the
motherboard is designed to support the extra power requirements of
the Serdes chips under Aux. power.

The driver will have to get some information from NVRAM to decide
whether Serdes WoL can be supported.  This should be doable and
I'll look into it.

Thanks.

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